I will be installing my wideband soon. I do have a bung that is available currently but it is the J shaped protrusion/elbow on my Helix test pipe. If I install the sensor in there, will it distort the readings?

 

It will be fine as long as it's NOT behind the cat.

In fact, AEM recommends their sensor to be mounted 36" down stream from the turbine.

 

I'm running a test pipe, so running it behind a cat. conv. is a moot point.

I was wondering if it not being in the direct flow of the exhaust flow would affect the readings.

 

I don't think thats an ideal location for the sensor. I would have a bung placed between 9 - 3 o'clock so the sensor gets a GOOD whif of the exhaust gasses. better safe then sorry.

 

I would (and did) place the wideband sensor in the 12 o'clock position at the end of your downpipe (e.g. just in front of your testpipe or cat).

l8r)

 

Exactly. The elbow is used to limit the amount of gas the sensor sees. I cant see it working out very well at all. TurboXS DP FTW!

 

Why would the mixture be affected by removing the sensor a tiny bit out of the exhaust stream?

I know that the mixture becomes leaner because of contamination with air when moving it further downstream, hence the tailpipe sniffers reading leaner. But considering that this is barely moved downstream, and has no sources of air contamination, it SHOULD read the same.

I'm just going off common sense but my logic could very well be flawed.

 

If it read the same as a normal bung, the 'J' attachment wouldn't be used to trick O2 seonsors into thinking the cat was still in place... in fact there would be no reason at all to have the J.

 

Here are some pics of where I placed my sensor. at the end of the Dp and there is a rubber plug on the right side of the tunnel, just before the end of the DP





Mike

 

I use the same location for my UEGO sensor..Just in an AMS dp..-Gabe

 

12o'clock in the downpipe before the cat..... that where mine is

 

This is the correct location and clocking. The sensor needs to be in the exhaust stream. You want to read the fresh exhaust in real time instead of the exhaust held in the "J" pipe.

 

can anybody tell me where i can find a bung for my uego sensor????

 

Try ebay...Only buy stainless!

 

This is NOT a wideband. on the RHD EVO 8 260 models the second O2 sensor (the one used for the cat efficiency) is situated here (on stock exhaust it screws into the flange of the main cat as there is a small cat in the DP about 6-8" after the O2 housing.

this is the std O2 sensor

can send more pics if you want to see what i mean

Mike